Process of solidifying mortar and concrete formations.



ROBERT o. STUBBS, or DALLAS, TEXAS.

PROCESS OF SOLIDIFYING MQRTAB AND CONCRETE FORMATIONS.

Specification of Letters Patent.

Patented April 13, 1909.

Application filed September 1, 1908. Serial No. 451,248.

very hard or substantial artificial stone or concrete. I have provided a method of removing all air bubbles and practically all excess moisture from the mixed composition before it becomes hard or set. It is apparent that if Water or moisture is left in considerable quantities in the composition, the com-.

position will in time become more or less porous and it cannot be-very firm or substantial. The same is true if air is left in appreciable uantities in the com osition.

Re erence is had to t e accompan ing drawing which forms a part of this app ication.

The drawin shows a section of a concrete formation an a Weighted electric vibrator resting on the formation.

The improved rocess is applicable for makin building b ocks or slabs or Walls or an ot er structure of similar consistency.

he composition is prepared as usual b mixing the proper quantities of cement, san and stone or other in edients with suitable quantities of water. he composition is then placed in a mold which is absolutely fixed and not subject to oscillating or vibratory movement. For many structures the composition is laced Where it is to be located, such as wa s, streets, or sidewalks, and like structures. A'weighted vibrator, such as shown in the drawing, is then'placed on top of thecomposition and set to vibrating and causedto vibrate until the desired result is accomplished. When structures which are to be moved to-other places are to be made, molds, are used which maybe rigid and firm and unshakable while the'operation of yibrating the composition is going on. The vibration or vibratory motion is'a plied to the top of the formation. Thus a vi rating pressure is applied to the surface of the concrete, and a continual application of the vibrating pres sure will so increase the solidity and density of the composition that the vibrations will be transmltted throughout the mass of the concrete. The pressure and the vibration cooperate to remove all collected air and excess moisture.

It is apparent that this process is applicable to any construction in which mortars or concrete are to. be used.

In applying pressure to the composition, sufficient ressure must be applied along with the v1 rating motion to force the vibrations to but not beyond the limits of the mass of the composition. The process is vibration with pressure and not agitation.

This application is a continuation of my application filed in the Patent Oflice on J anuary 12, 1907, and is made in response to the decision of the Examiners-in-Chief.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent, is,-

1. The herein described process of solidifying mortar and concrete formations consisting of mixing ingredients to the desired consistency in a fixed location and applying a vibrating pressure to the surface of the composition.

2. The herein described process of solidi.-.

tying artificial stone formations consisting of mixing lngredients to a suitable consistency,

placing the same in unshakable molds and applying pressure and vibratory motion to t e1 sur ace of the composition simultaneous 8. The herein described process of solidifying mortar and artificial stone formations consisting of mixing ingredients to a suitable consistency in an .unshakablc receptacle, applying vibratory motion to the composition, and applying pressure to the surface of the composition until the vibrations cease.

4. The herein described process of making artificial stone formations consisting of mixing ingredients to a suitable consistency, putting the composition in receptacles fixed a ainst shaking and vibratory motion, ap p ying a vibratory motion to the composition, and applying pressure to the surface of the composition while being vibrated to render the material solid and compact and to drive out moisture and air.

5. The herein described rocess of solidifying artificial stone formations consisting of mixing ingredients to a suitable consistency, placing the composition in molds which are fixed against shaking or agitating lnotion, presence of two witnesses, thls 11th clay of applying fa, ciontinual vlbratory (plot-i011: to the August, 1908. surface 0 1; 1e composition an at t e same s time applying enough ressure on the com- ROBT' 5 position to force the v1 ration substantially Witnesses:

to the limits of the mass. A. L. JACKSON,

In testimony whereof, I set my hand in the J. W. STETT. 

